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Transfers 9 hours ago Read By Dan Kilpatrick, Tottenham correspondent Tottenham seal club-record signing of Ajax defender Davinson Sanchez Victor Wanyama says Tottenham won't be out for revenge against Chelsea at Wembley. Wanyama was speaking at Leagoo's unveiling as Spurs' official mobile phone partner. Dele Alli hit home two goals in a sp an of nine minutes for Spurs against Chelsea last season. Tottenham manager Mauricio Pochettino stresses the need for more competition in the squad after Spurs' 2-0 win at Newcastle.

Tottenham Hotspur have completed the club-record signing of Ajax centre-back Davinson Sanchez on a five-year deal, subject to a medical and work permit.

The Dutch side confirmed the 21-year-old would depart as Tottenham pay a transfer fee of â¬40 million (Â£36.6m) that could rise to â¬42m (Â£38.4m) with add-ons, depending on his appearances and success at the club.

Sanchez become the club's first signing of the summer, and the most expensive in Tottenham history, breaking the Â£30m record set by Erik Lamela and Moussa Sisso ko.

Boss Mauricio Pochettino said earlier on Friday that he wants to make four additions.

Sanchez, a Colombia international, was named Ajax's Player of the Year last season but told the club this week that he wanted to join Spurs.

"I would like to thank the coach, management, players and fans of Ajax," he said in a Spurs statement. "It is a great move for me to come here to develop my career.

"I am very excited to be signing for such a famous club as Tottenham Hotspur. I am looking forward to working with Mauricio Pochettino and the players and meeting everyone there."

Former Tottenham and Ajax coach Martin Jol said Sanchez would need to "learn his trade" to be a success in the Premier League and could find opportunities limited at Spurs.

Jol said: "If you play for Ajax, you can play for any club in the world -- that is reality. He was arguably their best player. He is unbelievably quick. For a y oung player, he was mentally strong at Ajax. But to be mentally good for the Premier League, you have to learn your trade.

"Where can Sanchez play? If Pochettino plays three at the back, that's different. Then maybe [Eric] Dier or [Mousa] Dembele doesn't play. And I think Dembele is probably the best player at Spurs.

"I think the ideal situation would be to take Sanchez on loan with an option [to buy]. See if he plays. But that's impossible. Ajax gave him a contract until 2022, so they can ask whatever they want."

Sanchez is the fourth ex-Ajax player at Spurs after Jan Vertonghen, Toby Alderweireld and Christian Eriksen, who were managed by Jol in Amsterdam.

Vertonghen joined in 2012, aged 25, while Alderweireld was 24 when he moved to Atletico Madrid and made just 10 league starts before moving to Southampton on loan.

Davinson Sanchez will be the fourth ex-Ajax player at Spurs.

Eriksen was 21 when he joined Spurs in 2013 but he had been a regular for club and country since Jol gave him a debut aged 17.

"Toby had to learn to be tough," Jol said. "He was annoyed with me occasionally because I said: 'You're good on the ball, you're an unbelievable passer but you need to be more cynical'. As a defender, you have to be ruthless.

"He didn't play for Atletico but he knew he had to be tougher. In the Premier League or La Liga, you have to be cynical, you have to be ruthless. And he learned that. He's unbelievable now, I think he's the best centre-back in England.

"Spurs could have taken Toby from Ajax but he was probably not ready then. It is good to let them play first or buy them and let them play on loan.

"When Jan went from Ajax, he was a little bit more experienced, a little bit older and he was ready when he went to Spurs.

"And Eriksen is probably, of all these players, the biggest talent."

The arrival of Sanchez will allow Kevin Wimmer to join West Bromwich Albion in a Â£15m move after the Austrian defender opened talks with the Baggies this week.